Sen. Richard Burr, R-N.C., right, talks with Sen. Richard Shelby, R-Ala., left, as they ride an escalator on Capitol Hill in Washington, Friday, March 22, 2013, as lawmakers rush to the Senate floor to vote on

Sen. Richard Burr, R-N.C., right, talks with Sen. Richard Shelby, R-Ala., left, as they ride an escalator on Capitol Hill in Washington, Friday, March 22, 2013, as lawmakers rush to the Senate floor to vote on